EP2428791B1 - Optisches Analysegerät - Google Patents

Optisches Analysegerät Download PDF

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Publication number
EP2428791B1
EP2428791B1 EP10009348A EP10009348A EP2428791B1 EP 2428791 B1 EP2428791 B1 EP 2428791B1 EP 10009348 A EP10009348 A EP 10009348A EP 10009348 A EP10009348 A EP 10009348A EP 2428791 B1 EP2428791 B1 EP 2428791B1
Authority
EP
European Patent Office
Prior art keywords
flange
optical analysis
accordance
analysis device
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10009348A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2428791A1 (de
Inventor
Ingo Schiffler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sick AG
Original Assignee
Sick AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sick AG filed Critical Sick AG
Priority to EP10009348A priority Critical patent/EP2428791B1/de
Priority to US13/227,167 priority patent/US8587784B2/en
Priority to KR1020110091462A priority patent/KR101275104B1/ko
Publication of EP2428791A1 publication Critical patent/EP2428791A1/de
Application granted granted Critical
Publication of EP2428791B1 publication Critical patent/EP2428791B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
    • G01N2021/151—Gas blown
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
    • G01N2021/536—Measurement device mounted at stack
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids

Definitions

  • the invention relates to an optical analyzer for analyzing a medium in a measuring volume with the features of the preamble of claim 1. It comprises a housing with an opening, a flange for holding the housing in a receiving opening of the measuring volume and an optical analysis unit.
  • Such analyzers are used, for example, to determine the concentration of gases or dust or soot particles in industrial exhaust chimneys.
  • a transmission light measurement can be carried out, in which a transmitted light beam through a measurement volume - for example, transversely through an exhaust duct - is performed, by means of an associated light receiver that portion of the transmitted light is measured, which acts on the light receiver only attenuated, since part of the transmitted light is absorbed by particles or molecules in the measurement volume. From the measured attenuation of the transmitted light, the concentration in the measuring volume can be determined.
  • a transmission light measurement can also be carried out using a reflector, for example, so that the light emitter and the light receiver can be arranged on the same side of the measuring volume and on the other side only the light reflector is provided.
  • scattered light measurements can be carried out, in which the transmitted light scattered on the particles within the measuring volume is detected.
  • Such an optical particle concentration measuring device is in DE 10 2005 025 181 A1 described.
  • Such analyzers are used to observe or measure a medium, for example a gas or a liquid in the measurement volume.
  • a medium for example a gas or a liquid in the measurement volume.
  • the term "measuring volume” is used here for the space in which the medium to be observed or measured is located or moves. It may therefore be, for example, a corresponding container or a channel or a pipe.
  • Gas detectors in particular which are coupled to plants via flanges, often contain a flush, which serves to keep optical interfaces clean, which are located, for example, in the form of windows between the measuring volume and the gas meter.
  • a flush which serves to keep optical interfaces clean, which are located, for example, in the form of windows between the measuring volume and the gas meter.
  • the measuring medium is, for example, a corrosive gas.
  • An optical system with flushing of a viewing window is in DE 10 2004 018 534 B4 described.
  • devices with a flush have quite large dead volumes in the range of the coupling of the measuring device to the measuring volume.
  • such devices must also be rinsed when using clean (ie for example low-dust and non-corrosive) applications, so that the measured value of the particle concentration is not impaired by other concentrations or a different time behavior within the dead volumes.
  • Object of the present invention is to provide an optical analyzer, with a flexible adjustment of the process connection to the measurement volume is possible.
  • the device according to the invention comprises a flange for holding the housing in a receiving opening of the measuring volume.
  • the housing with the measuring arrangement is therefore not simply screwed to the measuring volume or, for example, firmly welded. Instead, a flange for holding the housing is provided with the measuring structure.
  • a fastening stub is provided according to the invention, with which the housing can be fastened to the flange, wherein the outer geometry of the attachment stub is adapted to the internal geometry of the flange so that the attachment stub can be moved in the direction of the measuring volume and away.
  • the attachment stub may have a seal which seals the outside of the attachment stub against the inside of the flange.
  • a clip is also provided, with which the flange and the attachment stub can be positively or non-positively connected to each other in different positions of the attachment stub in the flange.
  • an optical analysis unit for optical analysis of the medium in the measuring volume through the opening of the housing.
  • This may be, for example, a transmitting element in the housing for emitting a measuring light beam through the opening into the measuring volume and a receiving element in the housing for receiving scattered or transmitted light from the measuring volume.
  • the measuring arrangement contained in the housing is usually completed by a viewing window, so that in operation the measuring arrangement (which in the example described consists of a transmitting element and a receiving element) is closed relative to the measuring volume.
  • An optical analyzer makes it possible for the housing with the optical analyzer unit to be displaced in the flange for holding the housing in a receiving opening of the measuring volume.
  • a suitable depth adjustment of the housing can be adjusted in the receiving opening of the measuring volume.
  • the analyzer according to the invention is particularly flexible in this respect. For example, a flush process connection can be set with a small or no dead volume at which a viewing window of the analyzer is flush with the wall of the measurement volume. Such a setting is particularly suitable for clean, non-corrosive media to be examined with moderate temperatures, where no flushing of the process connection is necessary.
  • a particular embodiment of the analyzer according to the invention comprises a fastening nozzle which is tubular.
  • an optical socket can be provided in which a light-guiding element which guides the light of the transmitting element into the measuring volume or out of the measuring volume to the receiver element or a transparent body forming a viewing window is provided.
  • the flange may have on its outer circumference a radially outwardly pointing extension, on which a clip provided on the radially inwardly facing projection can engage, which engages around the flange.
  • the attachment piece can have on its outer circumference a plurality of first engagement elements and the clip on its inner circumference at least one corresponding second engagement element. Depending on which of the first engagement elements of the attachment piece cooperates with the at least one second engagement element, different adjustment depths of the attachment piece in the flange can be realized.
  • the first engaging elements are designed as grooves and the at least one second engaging element of the clip as a corresponding spring.
  • a groove / spring connection is particularly stable to ensure a positive fit.
  • seals may also be provided in a simple manner at a suitable location to seal the attachment piece against the flange.
  • flange can be releasably connected to the measuring volume.
  • different flanges can be attached to the measurement volume in a simple manner in order to use different attachment sockets and analysis devices.
  • a corresponding flange can be configured in several parts in order to be able to set different flange lengths.
  • An optical analyzer according to the invention can also be used with a measuring volume in which there is a receiving socket protruding from its wall, at the end of which the measuring volume can be fastened to the flange of the optical analyzer.
  • a receiving socket protruding from its wall at the end of which the measuring volume can be fastened to the flange of the optical analyzer.
  • the receiving socket of the attachment piece of the optical analyzer can be inserted in the desired depth, so as to be able to realize different dead volumes.
  • An optical analyzer according to the invention can advantageously be used for measuring and monitoring gas. Likewise, a use for liquids is possible.
  • the optical analyzer according to the invention is suitable for measuring concentrations.
  • concentrations For example, the scattering of light in the measurement volume can be measured to determine the particle concentration.
  • a measuring arrangement is suitable, for example, for determining the dust or soot content in the exhaust gas of a chimney.
  • To the optical analyzer is flanged to a side opening of the chimney, the interior of the chimney representing the measuring volume.
  • the optical analysis device according to the invention can also be used, for example, to determine the composition of a medium in the measurement volume.
  • the optical analysis unit in the housing of the optical analysis device according to the invention may comprise a spectroscopic evaluation device for the reflected light received from the measurement volume.
  • the invention is not limited to such optical analyzers.
  • the optical analyzer 100 shown has a housing 108. Therein, for example, in a manner known per se, a transmitting element and a receiving element for emitting or receiving light (visible light, ultraviolet light or infrared light), which form an optical analysis unit.
  • the emitted light beam from the transmitting element is sent through a mounting nozzle 26 in the direction of a measuring volume within which there is a medium whose concentration or composition is to be measured.
  • the measuring volume can be, for example, a channel through which the medium flows or a container in which the medium is located.
  • the optical analyzer 100 is screwed over with a flange 10 with the fastening screws 12 at a receiving opening of the measuring volume, not shown here.
  • nozzles 102, 104 are introduced through the electrical leads, control lines and data lines in the housing 108 in a conventional manner.
  • connection part 110 of the analyzer 100 to the measurement volume is described in detail in FIG Fig. 1 shown.
  • Fig. 1 On the left side of the Fig. 1 is the flange 10, with the aid of which the connection part can be attached to the measuring volume, not shown.
  • fastening screws 12 are provided, which can be screwed into corresponding threaded openings in the wall of the measuring volume.
  • an O-ring seal 14 is provided in a corresponding groove of the flange 10.
  • the flange 10 has an inner opening 11, into which a fastening sleeve 20 can be pushed, which - as it is in Fig. 2 is visible - protrudes on one side of the housing 108 from the optical analyzer 100.
  • the optical guide element 22 serves to guide the light of the transmitting element out of the optical analyzer 100 in the direction of that on the left side of FIG Fig. 1 to be fixed measuring volume.
  • the interface of the optical guide element 22 in the direction of the measuring volume is designated by reference numeral 23.
  • an optical viewing window or a lens may be used and optionally sealed.
  • the optical interface of the optical guide element 22 or of the optical viewing window can be inclined towards the measurement volume.
  • a plurality of grooves 26 On the outer circumference of the attachment piece 20 are a plurality of grooves 26 at a defined distance.
  • springs 28 engage to allow a positive connection.
  • the grooves 26 may also be arranged so that at least one of them serves to receive an O-ring 29, which seals the attachment piece 20 against the flange 10.
  • the bracket 30 also has on its inner circumference a circumferential extension 35 which delimits a recess 36 which comprises the peripheral outward-pointing projection 34 of the flange 10.
  • the attachment piece 20 can be pushed in the direction 18 through the flange.
  • the flange 10 can be fixed to a measuring volume with the aid of the fastening screws 12, so that the opening 11 corresponds to a corresponding receiving opening in the measuring volume.
  • the flange is sealed by the O-ring seal 14 with respect to the wall of the measuring volume.
  • the attachment piece 20 can be inserted with the optical guide element 22.
  • An O-ring seal 29 in one of the grooves 26 serves to seal the outer surface of the attachment piece 20 against the inner surface 11 of the flange 10th
  • the attachment piece 20 is fastened to the flange 10 with the clamp 30.
  • the clip is placed around the extension 34 and the spring 28 is brought into engagement with one of the grooves 26.
  • the screws 32 By tightening the screws 32 ( Fig. 2 ), the clip 30 is held positively on the attachment piece 20.
  • Fig. 1 a use is shown in which the smallest possible dead volume 112 is provided.
  • Fig. 3 shows a further embodiment with an axially longer flange 10 '.
  • This in the embodiment of Fig. 3 resulting dead volume 112 corresponds in size approximately to the dead volume of the embodiment of Fig. 1 .
  • Due to the longer flange design, however, a more secure connection between the attachment piece 20 is possible, which is more reliably secured against tilting, because it can be supported over a larger area on the inner surface 11 of the flange 10.
  • the rest of the function corresponds to that with reference to the embodiment of Fig. 1 described operation.
  • the same or similar elements are therefore designated by the same reference numerals.
  • Fig. 4 shows the same embodiment in a different usage mode.
  • the attachment stub 20 has not been inserted so far into the flange 10 'and then secured to the bracket 30 in the manner described using one of the grooves 26.
  • a purge can be provided which flushes the dead volume 112 and thus creates defined conditions.
  • openings and connections 114 for introducing purge gas can be provided in the flange 10 ', for example.
  • the 6 and 7 show an embodiment similar to that of Fig. 1 in a different state of use.
  • the optical analysis device 100 according to the invention is used here with a measuring volume whose wall has a receiving socket 42 which is directed away from the measuring volume.
  • Fig. 7 shows in contrast to Fig. 6 a section through a plane in the purge gas connections 114 for flushing the dead volume 112 can be seen.
  • the purge gas ports 114 are not used, as well as no dead volume 112 is present, as in the use according to Fig. 7 ,

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP10009348A 2010-09-08 2010-09-08 Optisches Analysegerät Not-in-force EP2428791B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10009348A EP2428791B1 (de) 2010-09-08 2010-09-08 Optisches Analysegerät
US13/227,167 US8587784B2 (en) 2010-09-08 2011-09-07 Optical analysis device
KR1020110091462A KR101275104B1 (ko) 2010-09-08 2011-09-08 광학 분석 장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10009348A EP2428791B1 (de) 2010-09-08 2010-09-08 Optisches Analysegerät

Publications (2)

Publication Number Publication Date
EP2428791A1 EP2428791A1 (de) 2012-03-14
EP2428791B1 true EP2428791B1 (de) 2013-03-27

Family

ID=43569260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10009348A Not-in-force EP2428791B1 (de) 2010-09-08 2010-09-08 Optisches Analysegerät

Country Status (3)

Country Link
US (1) US8587784B2 (ko)
EP (1) EP2428791B1 (ko)
KR (1) KR101275104B1 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015102319U1 (de) 2015-05-06 2016-08-09 Sick Ag Analysevorrichtung zur Analyse eines Gasstromes
DE202016104401U1 (de) 2016-08-10 2016-09-02 Sick Engineering Gmbh Rauchgaskanalüberwachungsanlage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2508869B1 (de) * 2011-04-05 2015-10-14 Sick Ag Konzentrationsmessgerät, Konzentrationsmessanordnung und Konzentrationsmessverfahren

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
DE3839348A1 (de) * 1987-11-23 1989-06-01 Bosch Gmbh Robert Vorrichtung zur messung der partikelbelastung im rauch- und abgas eines verbrennungsprozesses
US4988155A (en) * 1989-06-22 1991-01-29 The Dow Chemical Company In-line fiber optic probe interface
JP3792374B2 (ja) * 1997-10-29 2006-07-05 倉敷紡績株式会社 光学的濃度測定装置
US5969811A (en) * 1998-08-24 1999-10-19 Waller; Michael V. Spectral analyzer
DE19843553C2 (de) * 1998-09-23 2001-09-20 Bayer Ag Meßvorrichtung zur In-Prozeß-Kontrolle
US6188813B1 (en) * 1999-02-10 2001-02-13 Waters Investments Limited Flow cell, analyte measurement apparatus and methods related thereto
JP3701955B2 (ja) * 2003-09-29 2005-10-05 アンリツ株式会社 ガスセル、ガスセル製造治具及びガスセルの製造方法並びに半導体レーザモジュール
DE102004018534B4 (de) 2004-04-14 2006-10-26 Enotec Gmbh, Prozess- Und Umweltmesstechnik Optisches System mit Spülgaszufuhr zum Sichtfenster
DE102005025181A1 (de) 2005-06-01 2006-12-07 Sick Engineering Gmbh Partikelkonzentrations-Messvorrichtung und Messverfahren
WO2007049607A1 (ja) * 2005-10-28 2007-05-03 Matsushita Electric Industrial Co., Ltd. 測定デバイス、測定装置及び測定方法
JP4957213B2 (ja) * 2006-11-29 2012-06-20 井関農機株式会社 脱穀装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015102319U1 (de) 2015-05-06 2016-08-09 Sick Ag Analysevorrichtung zur Analyse eines Gasstromes
DE202016104401U1 (de) 2016-08-10 2016-09-02 Sick Engineering Gmbh Rauchgaskanalüberwachungsanlage

Also Published As

Publication number Publication date
US8587784B2 (en) 2013-11-19
EP2428791A1 (de) 2012-03-14
KR20120026019A (ko) 2012-03-16
US20120055238A1 (en) 2012-03-08
KR101275104B1 (ko) 2013-06-17

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